Method qe joining dissimilar



11111924, E. A. WERNER 1,768,180

. METHOD OF JOINING DISSIMILAR BODIES Filed March 5, 1928 d L Y 2 Patented June 24, 1930 1 UNITED STATES ATT GFFEQE EDWARD A. WERNER, F ATLANTA, GEORGIA METHOD OF JOINING DISSIMILAR BODIES Application filed March 5, 1928. Serial No. 259,316.

This invention relates to a. method of persubjected to a temperature of 130 0., to manently joining dissimilar bodies having superdry the glue and thereby make it mois different coefficients of expansion and conture-proof. After heating to the above temtraction under the same prevailing condiperature, the glue will be insoluble, thus as 5 tions. suring a permanent joint between the wood 5.

The particular adaptation of the invention and the sheet of asbestos. which forms the subject matter of this ap- The face of the slab of marble which is to plication is the formation of a permanent be secured to the asbestos sheet is preferably joint between a slab of marble, granite or simrubbed to form a relatively smooth surface,

ilar material and a body of wood or like suband to this rubbed surface I apply a coating stance. of shellac Varnish 5 made of bleached shel- A joint made in accordance with the prinlac. ciples of my invention will permit of the rela- The wood and asbestos assemblage is then tively uneven expansion and contraction of removed from the press, and while still warm bodies of the characters above noted without the slab of marble is applied thereto with destroying or injuriously affecting the perthe shellac coating in contact with the asmanency of the joint; will render the conbestos sheet, as shown. The shellac will cause struction fireproof; and will be insoluble in the marble slab to adhere to the asbestos and impervious to water, alcohol, acids, alsheet,-and the heat previously applied to the 20 kalies and other chemical solvents, thus assurwood and asbestos assemblage and still reing its permanency against any and all of tained therein will cause the bleached shellac usually destructive agencies. to gradually change its composition to' a The single figure of the drawing illusstate wherein it becomes insoluble in water, 7

trates, more or less diagrammatically, a joint alcohol, acids and alkalies.

between a slab of marble and a body of wood. If desired the entire assemblage may then In the drawing the slab of marble, or its be subjected to additional heat to thoroughly equivalent, is illustrated at 1, and a body of dry the joint, which will then become perwood, or its equivalent, is illustrated at 2. manent and will not be affected by any of Obviously marble and wood possess difthe elements or conditions above noted.

30 ferent coeflicients of expansion or contraction The asbestos sheet imposed between and under a prevailing condition common to both permanently attached to the Wood and marand in order to successfully join two such ble bodies lends to the joint the necessary materials in a permanent manner, the joint elasticity which permits the relatively uneven formed between the two must have a fair deeXpansion and contraction of these bodies 1 gree f l ti it under a prevailing condition, and further- In forming such a joint in accordance with more makes the construction fireproof. the principles of my invention the body of The structure thus provided has a Wide wood is thoroughly dried by any well known scope of utility and may be successfully emmeans. Preferably one of the well known ployed in building construction as a Wain- 0 hard woods is employed. scoting or panel, in which the marble slab On the surface of the wood body to which may be relatively thin, permitting the use it is desired to attach the marble slab, I first of expensive marble which would otherwise spread a coating of organic (animal) glue of be prohibitive for general use as a Wainscota relatively high grade, which is indicated at ing or for similar decorative purposes.

8. Upon this glue coating 3, I place a sheet The construction may also be successfully of asbestos, indicated at 4. This assemblage employed in the construction of various forms is then placed in a suitable press or clamp of monuments, supplanting the solid blocks and pressure applied thereb to cause the asof ornamental stone by a substantial wooden bestos sheet to uniformly adhere to the wood. framework faced with a relatively thin slab While under this pressure the assemblage is of the ornamental stone, thus permitting shipment of a comparatively large monument a greater distance for a cost equal to cost of shipping a small solid monument a relatively shorter distance, and making the erection of such monuments considerably easier.

While I have described the use of certain specific materials throughout the specification, obvious equivalents for these materials may be substituted without departing from the spirit of the invention, however, a joint employing the organic glue, the bleached shellac and the sheet of relatively tough and elastic material imposed between the bodies to be joined has proven to be both practical and efficient, when the joint is formed by the process above described and which I claim as new in the art.

' I claim:

1. A method of joining a body of wood with a body of stone comprising the coating of one surface of the wood with an animalorganic glue, applying a sheet of asbestos to the coated surface, simultaneously pressing and heating the assemblage to superdry the glue, applying a coating of shellac to one surface of the stone, releasing the pressure on said assemblage and applying the coated surface of the stone to the exposed surface of the asbestos sheet while the preheated assemblage is still warm whereby the shellac is changed from a liquid to a solid insoluble mass.

2. A method of joining a body of wood with a body of stone comprising the coating of one surface of the wood with an animal organic glue, applying a sheet of asbestos to the coated surface, simultaneously pressing and heating the assemblage to superdry the glue, applying a coating of shellac to one surface of the stone, releasing the pressure on said assemblage and applying the coated surface of the stone to the exposed surface of the asbestos sheet while the preheated assemblage is still warm whereby the shellac is changed from a liquid to a solid insoluble mass, and reheating the entire assemblage to thoroughly dry the joint.

8. An article of manufacture comprising a body of wood, a body of stone, a relatively yieldable body comprising an asbestos sheet superimposed between adj acently positioned faces of said wooden and stone bodies, a body of animal organic glue superimposed between the face of the wooden body and the adjacent face of the asbestos sheet, and a body of shellac superimposed between the opposite face of said asbestos sheet and the adjacent face of said stone body.

EDWVARD A. WERNER. 

